Thanks for threads like this. This is just where I am at re building my site at present - I've looked at it across a number of browser platforms and some handle it better than others. (I also used a site called "Screen shots")

I'm very new to website development, how best can I go about avoiding major problems in addressing this issue please? Should I get a professional coder for a few hours to improve in the back-end, so as to to handle better handle different browsers, or, is there software or a plug-in that can help?

Sorry if any of this sounds crazy, but as I say I'm new to all this and will thankfully welcome any suggestions?? Thank you.

Tanks for your answer DAkers.

And why it is possible that some changes you make not directly change in your browser?
For example: I changed the "header logo link" lettertype and letterhight. And i saw the chages I made only the next day.

Many web files get cached by the browser. Chrome in particular has a particularly sticky browser cache.

If you refresh the page a few times (F5 and CTL+F5), the revised styles will be loaded.

Thanks,

Indeed, it was Chrome where I was talking about.

Of course check your concrete5 settings - you'll need to disable caching on the server end and also clear your cache when applying changes in your browser.